Key Takeaway
Reverse Phone Lookup extracts structured professional data from any LinkedIn profile URL — including headline, experience, education, skills, and certifications — at 1 credit per run. It is part of SyncGTM's 75+ enrichment library and is available via CLI and MCP.
What is Reverse Phone Lookup Action?
Reverse Phone Lookup is a research action that identifies the owner of a phone number using public records, directories, and data aggregation services. Given a phone number, it returns the associated person or business name, address, carrier information, and line type. This action is useful for verifying contact information, enriching lead data, and validating phone numbers before outreach campaigns.
The action queries multiple public record databases and phone directories to provide the most comprehensive match available. It supports both landline and mobile numbers across major countries. Sales teams can use reverse phone lookup to verify that phone numbers in their CRM are still associated with the right contacts, identify unknown callers, or enrich inbound lead data with additional context before routing to sales reps.
This action uses waterfall enrichment to query multiple premium data providers in sequence, delivering higher match rates than single-source alternatives. Learn more about how waterfall enrichment works.
How it works
- 1
Provide a phone number in international format.
- 2
SyncGTM queries public records, directories, and data aggregation services to identify the phone number owner.
- 3
The action returns the associated name, address, carrier, line type, and verification status.
- 4
Use the results to verify contacts, enrich CRM data, or validate phone numbers before outreach.
Use cases
Contact Verification
Verify that phone numbers in your CRM are still associated with the right person. Identify stale or reassigned numbers before your team wastes time calling them.
Inbound Lead Enrichment
When a lead submits only a phone number, use reverse lookup to identify them. Enrich the lead record with name, location, and company before routing to a sales rep.
Data Quality Auditing
Run reverse lookups on your phone number database to identify invalid numbers, VoIP lines, or numbers that have been reassigned. Improve your connect rates by cleaning bad data.
Input
| Field | Type | Required | Description |
|---|---|---|---|
| phone_number | string | Yes | The phone number to look up in international format (e.g., +14155551234). |
Output
| Field | Type | Description |
|---|---|---|
| owner_name | string | Name of the phone number owner (person or business). |
| owner_type | string | Whether the owner is a person or business. |
| address | string | Associated address (when available). |
| carrier | string | Phone carrier or provider. |
| line_type | string | Type of phone line (mobile, landline, VoIP). |
| is_valid | boolean | Whether the phone number is valid and active. |
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